Hydrangeas are plump, large, refreshing, and beautiful, pleasing to the eye. They are common potted ornamental flower. The park built in the early 20th century cannot be survived without the planting of hydrangeas. Hydrangeas in modern parks and scenic spots are planted in pieces to form a landscape.
Hydrangeas are native to Japan and Sichuan, China. Introduced to England in 1736. In Europe, they are widely cultivated in the Netherlands, Germany, and France. Red, blue, and purple Hydrangea varieties can be seen in flower shops. There are also many hydrangeas planted in front of small gardens and buildings.
German company Rampp Jungpflanzen is a world-famous enterprise producing Hydrangea, and it is also the main cultivation and production unit of new varieties of hydrangea. Secondly, the Netherlands's Men Fanwen company and Israel's Yager nursery are also the main manufacturers of hydrangea. Hydrangea is abundant in Asia, mainly in Japan. There are a wide variety of Hydrangea in horticultural stores. You can see many new varieties with strange colors and high prices, which are used as family potted plants for viewing.
Hydrangeas like warm, humid, and semi cloudy environment. The suitable temperature for them to grow is 18-28 ℃, and the temperature in winter should not be lower than 5 ℃. Flower bud differentiation takes 6-8 weeks at 5-7 ℃, and 20 ℃ can promote flowering. Maintaining 16 ℃ after flowering can prolong the flowering period. But the high temperature makes the flowers color fade quickly.
Hydrangea basin soil should be kept wet, but they should not be watered too much. Pay attention to drainage in rainy season to prevent root rot caused by waterlogging. Indoor potted Hydrangeas in winter are better to be slightly dry. Too much water will make the leaves perishable. Hydrangeas are plants that like short sunshine. They should be kept in darkness for more than 10 hours a day then they will develop flower buds in about 45-50 days.
The cultivation of Hydrangea should avoid the scorching sun, and 60% - 70% shade is the best. The soil should be loose, fertile, and well drained sandy loam. However, the color of Hydrangea changed greatly with the change of soil pH. To deepen the blue, aluminum sulfate can be applied during flower bud formation. To keep them pink, lime can be applied to the soil.
